Hello,

I use script to build a model. I'd like to simulate a tube under internal pressure. I use "BaseShellExtrude" for my sketch, then "offsetType=TOP_SURFACE" for section, and "side2Faces, findAt external surface points" for the load. I get the model I want, a tube with internal pressure. Then I build the second model, now the model includes twist (pitch), so "BaseShellExtrude with TWIST".  Offset and faces are still the same, TOP_SURFACE and side2Faces do not change. However, instead of a internal pressure the second model is suffered from external pressure. I will get a internal pressure for the second model  if I change the command "side2Faces" to "side1Faces".

Can a 'twist" cause this problem?

Thank you for the explanation.

Regards

Adhi